DECEMBER 6, 1918] 
heterogeneous syenite-granite magma split up 
into layers, but also differential movements of 
the layers, at least during late stages of magma 
solidification. This conception does not, how- 
ever, preclude the possibility of some differen- 
tiation after portions of the magma came to 
rest, or even before the intrusion began. In 
fact it is reasonable to suppose that the com- 
monly occurring large-scale, irregular, gradual 
transitions from granite and granite porphyry 
to syenite and even diorite may have resulted 
from differentiation of the syenite-granite 
magma before, or during an early stage of, the 
intrusive process. 
Another explanation, supported by field evi- 
dence, to account for at least some cases of 
banded structure should be mentioned. Thus 
at a number of localities gray or greenish- 
gray basic syenite or even diorite bands occur 
in the syenite-granite series where dark Gren- 
ville gneiss or amphibolite inclusions are also 
common. Both igneous-looking bands and in- 
clusions lie parallel to the foliation of the 
country rock. Sometimes the boundaries of 
the inclusions are very sharp, but in other 
eases they are not, and plainly more or less 
fusion of the inclusions has taken place. All 
stages from thoroughly fused and absorbed in- 
clusions to others where little or no fusion has 
taken place may be seen. The thoroughly 
fused inclusions have a distinctly igneous ap- 
pearance and their boundaries of course merge 
into the enclosing rock yielding a more or less 
well developed banded structure. Some typ- 
ical cases of this kind of magmatic assimila- 
tion are described by the writer in a recent 
paper,® and still others in various New York 
State Museum bulletins by the writer. Of 
the large number of cases which have come 
under the writer’s observation, nearly all are 
of very minor extent, and usually such band- 
ing is definitely recognizable as having re- 
sulted from assimilation rather than pure 
differentiation. There is no positive evidence 
that large bodies of the syenite or granite 
have been appreciably changed in composition 
due to the incorporation or assimilation of 
Grenville rocks. Thus, while it seems certain 
5 Geol. Soc. Amer. Bull., Vol. 25, pp. 254-260. 
SCIENCE 
563 
that assimilation has played a minor role in 
the production of banding of the syenite-gran- 
ite series, the actual quantitative importance 
of assimilation as compared with differentia- 
tion is by no means definitely known. 
WituiaM J. MILLER 
SmitH COLLEGE 
PROCEEDINGS AND RESOLUTIONS OF 
THE THIRD RESUSCITATION 
COMMISSION? 
Tue Commission met in New York at. the 
Rockefeller Institute on Friday, May 17, 1918. 
There were present at the meeting: Passed As- 
sistant Surgeon E. F. DuBois, U. S. N. R. F., 
of the Bureau of Medicine and Surgery, Navy 
Department; Dr. D. L. Edsall, professor of 
medicine and dean, Harvard Medical School; 
Mr. W. C. L. Eglin, chairman of committee on 
safety rules and accident prevention of the 
N. E. L. A.; Dr. Yandell Henderson, professor 
of physiology, Yale University and consult- 
ing physiologist of the Bureau of Mines; Dr. 
Wm. H. Howell, professor of physiology and 
assistant director of the school of hygiene 
and public health, Johns Hopkins University, 
member of the National Academy of Sciences; 
Dr. Reid Hunt, professor of pharmacology, 
Harvard Medical School, Secretary of Com- 
mission; Professor A. E. Kennelly, professor 
of electrical engineering at Harvard Univer- 
sity and the Massachusetts Institute of Tech- 
nology; Dr. Charles A. Lauffer, medical di- 
rector of the Westinghouse Electrie Co., Pitts- 
burgh, Pa.; Dr. S. J. Meltzer, Rockefeller In- 
stitute, chairman of the commission, member 
of the National Academy of Sciences; Dr. 
Joseph Schereschewsky, Assistant Surgeon 
General, U. S. Public Health Service; Dr. 
G. N. Stewart, professor of experimental med- 
icine, Western Reserve University, Cleveland; 
Professor Elihu Thomson, General Electric 
Co., West Lynn, Mass., member of the Na- 
tional Academy of Sciences; Lieutenant Col- 
onel Edward B. Vedder, of the Army Medical 
1 Held under the auspices of the Committee on 
Safety Rules and Accident Prevention of the Na- 
tional Electric Light Association. Edited by Pro- 
fessors Howell, Stewart and Thomson. 
